Ventilation system

ABSTRACT

A power assisted ventilation system for a conservatory of the type having a roof extending away from a wall or other supporting structure that is mountable where the roof meets the wall of other supporting structure has a back plate mountable to the wall or to a glazing panel support means already on the wall and an apertured cover securable to the back plate.

[0001] This invention concerns a ventilation system suitable for use in a conservatory roof.

[0002] For a conservatory roof having a central ridge it is convenient to locate a power assisted ventilation system in the ridge for extraction of hot and/or stale air. But in a conservatory roof of the type having a roof sloping from a wall or other structure there is no corresponding position for a ventilation system.

[0003] An object of this invention is to provide a power assisted for conservatories of the type having a roof extending away from a wall or other supporting structure.

[0004] According to this invention there is provided a power assisted ventilation system for a conservatory of the type having a roof extending away from a wall or other supporting structure that is mountable where the roof meets the wall of other supporting structure.

[0005] The ventilation system of the invention preferably has a back plate mountable to the wall or to a glazing panel support means already on the wall and an apertured cover securable to the back plate. The cover is preferably formed as a grill preferably of over a major portion of its surface to allow air to flow into the ventilation system.

[0006] The ventilation system of the invention preferably includes a cowl for directing air flow towards an outlet through the roof, air flow being preferably provided by means of an electrically operated rotor. The rotor is preferably mounted on a horizontal axis.

[0007] A motor for driving the rotor is preferably on anti-vibration mountings. Ideally, the motor is in part of the cowl and the cowl is mounted on anti-vibration mountings.

[0008] The-ventilation system of the invention preferably has one or more ones way flap valves through which air flow is directed on the its way out of the conservatory.

[0009] Preferably means for securing the roofing panels to the wall provide an air flow path from the one-way valves. The preferred securing means comprises a channel member used on its side in which roofing panel ends sit. The channel member is preferably secured to the wall by spaced brackets so that there is an air flow space behind the channel member and between the brackets. A cover on the channel member then stop ingress of rain but includes apertures in its support structure for air flow to pass under the cover and through its support structure.

[0010] This invention will now be further described by way of example only, with reference to the accompanying drawings, in which:

[0011]FIG. 1 shows a ventilation system for a conservatory roof;

[0012]FIG. 2 is a front view of the cover of the system of FIG. 1;

[0013]FIG. 3 is a bottom view of the cover of FIG. 2;

[0014]FIG. 4 is a first section through the ventilation system of FIG. 1;

[0015]FIG. 5 is a second section through the ventilation system of FIG. 1;

[0016]FIG. 6 is a third section through the ventilation system of FIG. 1;

[0017]FIG. 7 shows part of the system of FIG. 1 with the cover removed; and

[0018]FIG. 8 is an exploded view of the ventilation system of FIG. 1.

[0019] Referring to the accompanying drawings, a ventilation system 10 is shown for use with conservatory roofs of the type where the roof 12 is attached to a wall 14 or other similar structure and slopes down to the eaves. Whereas with conservatory roofs having a ridge, it is convenient to locate a power assisted ventilation system in the ridge. There is no corresponding positioning conservatory roofs of the type first mentioned.

[0020] The ventilation system illustrated aims to overcome the above-mentioned problem by being locatable where the roof meets the wall. Roofing panels (not shown in FIGS. 4 and 5) are supported in channel members 18 that are mounted in spaced brackets 20 screwed to the wall. Not shown is a capping that prevents rain ingress but permits air flow from behind the channel member and between the brackets.

[0021] The channel member 18 has a top barb 22 onto which the capping can be located and a bottom barb 24 and a slot 26 onto which under cladding 28 (see FIGS. 12) can be located. The latter barb 22 and slot 26 are used to support the ventilation system 10.

[0022] The system 10 comprises a generally inverted L-shaped back plate 36 having a top web 32 with a pair of spaced L-shaped ribs 34, 36, the first rib 34 locating over barb 24 and the second rib 36 locating in the slot 26 of the channel member 18. The other web 38 of the back plate depends from the first web and is fixed to the wall.

[0023] The free end of top web 32 is slotted (40) and the free end of the other web 38 has a lip 42. The slot 40 and lip 42 serve as locations respectively for cooperating rib 44 and slot 46 along top and bottom edges of cover 50. The cover 50 is in the form of a grill formed by angles slats 52. The cover is screwed to the back plate via screw holes 53 in ends 42 of the cover and snap-on end covers 55 are provided to conceal the screws and electrical wiring for the ventilation system that can be run behind the undercladding. The ends 54 have cut outs 57 for electrical wiring to pass through.

[0024] Mounted to the back plate via anti-vibration mountings 60 at each end is a cowl 62 having a cylindrical first part 64 containing a rotary motor 66 and a second open fronts part 68 in which is an axial fan 70 operated by the motor. The second part 68 of the cowl is shaped to direct air flow upwards through longitudinal slot 72 in the top of the cowl.

[0025] Directly above the slot 72 the top web o the back plate has a one-way flap valve 74 allowing air flow out behind the channel members but not the reverse. At one end of the ventilation system are electrical terminals 80 for connecting an external power supply to the motor.

[0026] The ventilation system illustrated can be fitted to a conservatory roof in a relatively unobtrusive fashion and is used to remove hot or stale air from within the conservatory to maintain pleasant conditions therein. By mounting the roof cowl on anti-vibration mountings noise levels can be kept down because operation of the ventilation system will have minimal vibrating effects on the roof itself. 

1. A power assisted ventilation system for a conservatory of the type having a roof extending away from a supporting structure that is mountable where the roof meets the supporting structure and having a back plate mountable to the wall or to a glazing panel support means already on the wall and an apertured cover securable to the back plate.
 2. A ventilation system as claimed in claim 1 , wherein the cover is formed as a grill.
 3. A ventilation system as claimed in claim 2 , wherein the cover has a grill extending over a major portion of the surface of the cover to allow air to flow into the ventilation system.
 4. A ventilation system as claimed in claim 1 including a cowl for directing airflow towards an outlet through the roof.
 5. A ventilation system as claimed in claim 4 , wherein airflow is provided by means of an electrically operated rotor.
 6. A ventilation system as claimed in claim 5 , wherein the rotor is mounted on a horizontal axis.
 7. A ventilation system as claimed in claim 5 , wherein a motor for driving the rotor is on anti-vibration mountings.
 8. A ventilation system as claimed in 7, wherein the motor is in part of the cowl and the cowl is mounted on anti-vibration mountings.
 9. A ventilation system as claimed in claim 1 having one or more one-way flap valves through which airflow is directed on its way out of the conservatory.
 10. A ventilation system as claimed in claim 9 , wherein means for securing the roofing panels to the wall provide an airflow path from the one-way valves.
 11. A ventilation system as claimed in claim 10 , wherein the securing means comprises a channel member used on its side in which roofing panel ends sit.
 12. A ventilation system as claimed in claim 11 , wherein the channel member is secured to the wall by spaced brackets so that there is an air flow space behind the channel member and between the brackets.
 13. A ventilation system as claimed in claim 12 , having a cover on the channel member to stop ingress of rain but which includes apertures in its support structure for airflow to pass under the cover and through its support structure. 